GE Fanuc Automation - Free

Computer Numerical Control Products 

Series 15i / 150i – Model A 

Remote Buffer 

Descriptions Manual 

GE Fanuc Automation 

B-63322EN-1/01 1999

Warnings and notices for 

this publication 

Warning 

In this manual we have tried as much as possible to describe all the various 

matters. However, we cannot describe all the matters which must not be done, 

or which cannot be done, because there are so many possibilities. 

Therefore, matters which are not especially described as possible in this 

manual should be regarded as “impossible”. 

Notice 

This document is based on information available at the time of its publication. While efforts have 

been made to be accurate, the information contained herein does not purport to cover all details or 

variations in hardware or software, nor to provide every contingency in connection with 

installation, operation, or maintenance. Features may be described herein which are not present in 

all hardware and software systems. GE Fanuc Automation assumes no obligation of notice to 

holders of this document with respect to changes subsequently made. 

GE Fanuc Automation makes no representation or warranty, expressed, implied, or statutory with 

respect to, and assumes no responsibility for accuracy, completeness, sufficiency, or usefulness of 

the information contained herein. No warranties of merchantability or fitness for purpose shall 

apply. 

The following are Registered Trademarks of GE Fanuc Automation 

CIMPLICITY® Genius® 

The following are Trademarks of GE Fanuc Automation 

Alarm Master 

CIMSTAR 

Field Control 

Genet 

Helpmate 

LogicMaster 

Modelmaster 

PowerMotion 

ProLoop 

PROMACRO 

Series Five 

Series 90 

Series One 

Series Six 

Series Three 

VuMaster 

Workmaster 

© Copyright 1998 FANUC Ltd. 

Authorized Reproduction GE Fanuc Automation Europe S.A. 

All Rights Reserved 

No part of this manual may be reproduced in any form. 

All specifications and designs are subject to change without notice. 

GFLE-003

B-63322EN-1/01 PREFACE 

PREFACE 

Applicable product name 

Related manuals 

The models covered by this manual, and their abbreviations are: 

Product name Abbreviations 

FANUC Series 15i-MA 15i-MA Series 15i 

FANUC Series 150i-MA 150i-MA Series 150i 

The table below lists manuals related to MODEL A of Series 15i, and 

Series 150i. In the table, this manual is marked with an asterisk (*). 

Table 1 (a) Related manuals 

Manual name 

Specification 

number 

DESCRIPTIONS B-63322EN 

CONNECTION MANUAL (Hardware) B-63323EN 

CONNECTION MANUAL (Function) B-63323EN-1 

OPERATOR’S MANUAL (PROGRAMMING) 

for Machining Center 

B-63324EN 

OPERATOR’S MANUAL (OPERATION) 

for Machining Center 

B-63324EN-1 

MAINTENANCE MANUAL B-63325EN 

PARAMETER MANUAL B-63330EN 

DESCRIPTIONS (Supplement for Remote Buffer) B-63322EN-1 * 

p-1

B-63322EN-1/01 

c-1 

CONTENTS 

PREFACE ................................................................................................................ p-1 

1. GENERAL............................................................................................................. 1 

2. INTERFACE BETWEEN REMOTE BUFFER AND 

HOST COMPUTER............................................................................................. 2 

2.1 ELECTRICAL INTERFACE ..................................................................................................... 3 

2.2 SOFTWARE INTERFACE ........................................................................................................ 4 

3. ELECTRICAL INTERFACE ............................................................................. 5 

3.1 TRANSMISSION SYSTEM....................................................................................................... 6 

3.2 RS-232-C INTERFACE.............................................................................................................. 7 

3.3 RS-422 INTERFACE................................................................................................................ 10 

4. PROTOCOL A....................................................................................................13 

4.1 MESSAGE FORMAT .............................................................................................................. 14 

4.2 CODE SYSTEM ....................................................................................................................... 14 

4.3 COMMUNICATION SYSTEM ............................................................................................... 15 

4.4 COMMAND ............................................................................................................................. 17 

4.4.1 Command Table.............................................................................................................................17 

4.4.2 Description of Data Part.................................................................................................................19 

4.5 PARAMETER TABLE............................................................................................................. 23 

4.6 ERROR PROCESS ................................................................................................................... 24 

4.7 STATUS TRANSITION........................................................................................................... 25 

5. EXPANSION PROTOCOL A...........................................................................26 


5.2 DATA PACKET FORMAT ..................................................................................................... 28 

5.3 MONITOR PACKET FORMAT.............................................................................................. 30 

5.4 COMMUNICATION EXAMPLE ............................................................................................ 32 

6. PROTOCOL B....................................................................................................41 


6.1.1 When the CNC Alarm/Reset is not Posted to the Host...................................................................42 

6.1.2 When the CNC Alarm/Reset is Posted to the Host.........................................................................44 

6.2 CONTROL CODE.................................................................................................................... 48 

6.3 BUFFER CONTROL................................................................................................................ 48 

6.4 ALARM AND RESET OF CNC .............................................................................................. 49 

7. EXPANSION PROTOCOL B (RS-422)...........................................................50

CONTENTS B-63322EN-1/01 

8. DATA INTERFACE ..........................................................................................51 

8.1 DATA PART ............................................................................................................................ 52 

8.2 INTERFACE OF DATA PART ............................................................................................... 52 

9. BINARY INPUT OPERATION FUNCTION .................................................53 

9.1 FUNCTION EXPLANATION ................................................................................................. 54 

9.2 TRANSFER RATE................................................................................................................... 57 

9.3 NOTES...................................................................................................................................... 58 

10. PARAMETER.....................................................................................................59 

10.1 INPUT DEVICE NUMBER ..................................................................................................... 60 

10.2 EXCLUSIVE PARAMETER FOR REMOTE BUFFER ......................................................... 61 

10.3 PARAMETERS RELATED TO BINARY INPUT OPERATION .......................................... 67 

11. ALARM ...............................................................................................................70 

12. MAINTENANCE................................................................................................71 

12.1 LED INDICATIONS ................................................................................................................ 71 

12.1.1 Normal State ..................................................................................................................................71 

12.1.2 System Errors.................................................................................................................................72 

12.2 MATERIAL FOR REMOTE BUFFER TROUBLESHOOTING ............................................ 74 

12.3 DETERMINING THE LOGICAL SLOT NUMBER OF 

THE REMOTE BUFFER BOARD .......................................................................................... 76 

12.3.1 Determining the Logical Slot Number on the Screen Displayed 

at the Time a System Alarm Occurs ......................................................................................76 

12.3.2 Determining the Logical Slot Number on the System Configuration Screen.........................77 

c-2

B-63322EN-1/01 1. GENERAL 

1 GENERAL 

15i/150i-MA 

The remote buffer for FANUC Series 15i/150i-MODEL A is an 

option and is used to allow a large number of data to be continuously 

supplied to the CNC at high speed by connecting it to the host 

computer or I/O device through a serial interface. 

Remote 

buffer 

RS-232-C/RS-422 

The followings can be performed by the remote buffer. 

1) It is used to perform DNC operation at high speed and with high 

reliability by performing on-line connection to the host 

computer. 

2) It is used to download the NC program and parameters from the 

host computer. When protocol B or expansion protocol B is 

used, NC programs and parameters can also be uploaded to the 

host computer. 

3) It is used to perform DNC operation and download various kinds 

of data by connecting to the I/O device. The following I/O 

devices can be connected. 

(1) FANUC PROGRAM FILE Mate 

(2) FANUC HANDY FILE 

Hereafter, the destination where the remote buffer is connected to is 

called “Host computer” for ease of explanation. 

-1- 

Host 

computer 

I/O device

2. INTERFACE BETWEEN REMOTE BUFFER AND HOST COMPUTER B-63322EN-1/01 

2 INTERFACE BETWEEN REMOTE BUFFER 

AND HOST COMPUTER 

-2-

B-63322EN-1/01 2. INTERFACE BETWEEN REMOTE BUFFER AND HOST COMPUTER 

2.1 ELECTRICAL INTERFACE 

The following which interfaces are provided as standard 

specifications. 

1) RS-232-C interface 

2) RS-422 interface (Note 1) 

RS-232-C RS-422 

Interface Serial voltage interface Balance transmission serial 

(start-stop system) 

interface (start-stop system) 

Baud rate 50 – 19200 baud rate 50 – 86400 baud rate 

(Note 2) 

(Note 1) 

Cable length 100m (4800 baud or less) Approximately 800m 

(MAX.) 50m (9600 baud) 

(9600 baud or less) 

15m (19200 baud) 

It differs depending on I/O 

devices. 

50m (19200 baud or more) 

NOTE 

1 When the baud rate exceeding 38400 BPS is used, the 

synchronization of reception clock is required. Prepare 

the TT (*TT) and RT (*RT) signals. 

2 When the baud rate used is 19200 baud or more, use the 

RS-422 interface. 

-3-

2. INTERFACE BETWEEN REMOTE BUFFER AND HOST COMPUTER B-63322EN-1/01 

2.2 SOFTWARE INTERFACE 

The following four protocols for communication between the remote 

buffer and host computer are provided. The protocol meeting the 

requirement of specifications of connection device can be selected by 

setting a parameter. 

Protocol Features of protocol 

Protocol 

A 

Expansion 

protocol 

A 

Protocol 

B 

Expansion 

protocol 

B 

It is the handshake system 

where transmit/receive is 

repeated between the both. 

It is nearly the same as the 

protocol A. However, the NC 

program can be transferred at 

high-speed so that it can be 

applied to the high-speed DNC 

operation. 

It is the system for controlling 

the communication between the 

both by the control code output 

from the remote buffer. 

The control system is the same 

as that of protocol B. However, 

it allows the transmission speed 

to be increased. In this case, it 

is required to receive the 

reception synchronization clock 

from the source. 

-4- 

Interface Transfer 

used rate (Max.) 

RS-232-C 19200 BPS 

RS-422 86400 BPS 

RS-422 86400 BPS 

RS-232-C 19200 BPS 

RS-422 86400 BPS 

NOTE 

The average data transfer speed becomes smaller than 

the maximum transfer speed.

B-63322EN-1/01 3. ELECTRICAL INTERFACE 

3 ELECTRICAL INTERFACE 

-5-

3. ELECTRICAL INTERFACE B-63322EN-1/01 

3.1 TRANSMISSION SYSTEM 

ON 

OFF 

ON 

OFF 

It is the start-stop system for adding the start bit before and stop bit 

after the information bits, respectively. 

The format for adding one parity bit to each byte of data to be 

transmitted is also allowed. 

1) Format with no parity bit 

1 character 

Start bit Stop bit 

Data bit 

Start bit 

b1 b2 b3 b4 b5 b6 b7 b8 

LSB MSB 

Data bit is sent starting from the LSB. 

2) Format with parity bit 

1 character 

Data bit 

b1 b2 b3 b4 b5 b6 b7 b8 

LSB MSB 

Data bit is sent starting from the LSB. 

The format with parity bit becomes the even parity including a 

parity bit. The number of stop bits of parameter determines 

whether there is a parity bit or not. 

Stop bit 1 → With parity bit 

Stop bit 2 → With no parity bit 

-6- 

Parity bit 

p 

Stop bit


3.2 RS-232-C INTERFACE 

CNC remote buffer board 

JD5L 

(PCR-E20LMDETZ-SL) 

1 RD 

2 0V 

3 DR 

4 0V 

5 CS 

6 0V 

7 CD 

8 0V 

9 

10 (+24V) 

11 SD 

12 0V 

13 ER 

14 0V 

15 RS 

16 0V 

17 

18 

19 (+24V) 

20 

1) Connection between devices 

NOTE 

(+24V) is used as the power to FANUC RS-232-C 

devices. 

-7- 

Host computer (example) 

1 FG 

2 SD 

3 RD 

4 RS 

5 CS 

6 DR 

7 SG 

8 CD 

9 

10 

11 

12 

13 

14 

15 

16 

17 

18 

19 

(DBM-25S) 

20 ER 

21 

22 

23 

24 

25


CNC 

Output 

Input 

SD 

RD 

RS 

CS 

ER 

DR 

CD 

0V 

2) General diagram of signal connection 

11 

1 

15 

5 

13 

3 

7 

When no CS is used, short-circuit it with the RS. However, 

when the protocol A or expansion protocol A is used, perform 

connecting as shown in the figure above for use as busy control. 

When DR is not used, short-circuit it with ER. 

Always short-circuit CD to ER. 

NOTE 

Connect the FG pin to the FG pin of the relay connector 

or to the protective grounding pin inside the locker. 

-8- 

SD 

RD 

RS 

CS 

ER 

DR 

CD 

SG 

FG Note) 

Host computer


Signal 

name 

RS-232-C 

circuit 

number 

Input/ 

output 

3) Signal description 

-9- 

Description 

SD 103 Output Send data 

See “3.1” for the bit configuration. 

RD 104 Input Receive data 

RS 105 Output Request to send 

CS 106 Input 

It is used to inform whether the remote buffer is ready to receive data or not. 

When the ER signal is on and this signal is on, the remote buffer is ready to 

receive data. 

Clear to send 

It is used to know the busy status at the host computer. When the DR signal 

is on and this signal is on, the host computer is regarded as being ready to 

receive data. 

DR 107 Input Data set ready 

When this signal is on, it is considered that the preparation at the host 

computer has been completed. Generally, it is connected to the ER signal of 

the host computer. When this signal is off during data transmission, an 

alarm occurs. 

Always connect it to the ER signal of CNC side when this signal is not used. 

ER 108.2 Output Data terminal ready 

When this signal is on, it is considered that the remote buffer is in ready 

condition. 

In general, it is connected to the ER signal at the host computer. If it is 

turned off during transmission of data, an alarm occurs. If this signal is not 

used, always connect this to the ER signal at the CNC side. 

CD 109 Input Received line signal detector 

This signal is not used for connection to the host computer. Thus, connect it 

to the ER signal of remote buffer side. 

SG 102 Grounding for signal 

FG 101 Grounding for protection 

NOTE 

Turn on or off signal according to the following: 

-3 V or less +3 V or more 

Function OFF ON 

Signal Condition Marking Spacing


3.3 RS-422 INTERFACE 

CNC remote buffer board 

JD6L 

(PCR-E20LMDETZ-SL) 

1 RD 

2 *RD 

3 RT 

4 *RT 

5 CS 

6 *CS 

7 RR 

8 0V 

9 *RR 

10 (+24V) 

11 SD 

12 *SD 

13 TT 

14 *TT 

15 RS 

16 *RS 

17 TR 

18 *TR 

19 (+24V) 

20 

1) Connection between devices 

NOTE 

Do not connect anything to the (+24V) pin. 

-10- 

Host computer (example) 

1 FG 

2 

3 

4 SD 

5 

6 RD 

7 RS 

8 RT 

9 CS 

10 

11 RR 

12 TR 

13 

14 

15 

16 

17 TT 

18 

19 SG 

20 

21 

22 *SD 

23 

24 *RD 

25 *RS 

26 *RT 

27 *CS 

28 

29 *RR 

30 *TR 

31 

32 

33 

34 

35 *TT 

36 

37


CNC 

Output 

Input 

SD 

*SD 

RD 

*RD 

RS 

*RS 

CS 

*CS 

TR 

*TR 

RR 

*RR 

TT 

*TT 

RT 

*RT 

0V 

2) General diagram of signal connection 

11 

12 

1 

2 

15 

16 

5 

6 

17 

18 

7 

9 

13 

14 

3 

4 

8 

NOTE 

Connect the FG pin to the FG pin of the relay connector 

or to the protective grounding pin inside the locker. 

-11- 

SD 

*SD 

RD 

*RD 

RS 

*RS 

CS 

*CS 

TR 

*TR 

RR 

*RR 

TT 

*TT 

RT 

*RT 

SG 

FG Note) 

Host computer


Signal 

name 

RS-232-C 

circuit 

number 

Input/ 

output 

3) Signal description 

-12- 

Description 

SD 103 Output Transmission data 

See “3.1” for the bit configuration. 

RD 104 Input Reception data 

RS 105 Output Transmission request 

CS 106 Input 

It is used to inform whether the remote buffer is ready to receive data or not. 

When the TR signal is on and this signal is on, the remote buffer is ready to 

receive data. 

Clear to send 

It is used to know the busy status at the host computer. When the RR signal 

is on and this signal is on, the host computer is regarded as being ready to 

receive data. 

TR 108.2 Output Terminal Ready 

(ER) 

When this signal is on, it is considered that the operation of remote buffer 

has been completed. 

In general, it is connected to the ER signal at the host computer. If it is 

turned off during transmission of data, an alarm results. If this signal is not 

used, always connect this to the ER signal at the CNC side. 

RR 109 Input Receiver Ready 

(DR) 

When this signal is on, it indicates that the host computer is ready to transmit 

data to the remote buffer. If this signal is not used, always connect it to the 

TR signal at the remote buffer side. 

TT 113 Output Transmission timing 

Transmission clock transmission terminal at the remote buffer side. When 

38400 baud or more is used, always connect it to the RT signal at the host 

computer side. 

RT 115 Input Reception timing 

Reception clock input terminal at the remote buffer side. When 38400 baud 

or more is used, always connect it to the TT signal at the host computer side. 

SG 102 Grounding for signal 

FG 101 Grounding for protection 

NOTE 

The signal turn on/off according to the following: 

A B 

Function OFF ON 

Signal Condition Marking Spacing 

Driver 

Receiver 

A 

B 

A 

B

B-63322EN-1/01 4. PROTOCOL A 

4 PROTOCOL A 

It is used for the handshake system where the communication between 

the remote buffer and host computer repeats transmission/reception 

each other. 

-13-

4. PROTOCOL A B-63322EN-1/01 

4.1 MESSAGE FORMAT 

2 byte 

3 byte 

The information (character-string) exchanged between the remote 

buffer and host computer is called “message”. The general type of 

message is shown as below: 

Field 

Byte 

length 

Abbreviation Meaning Remarks 

Checksum 2 No It is used to indicate the lower 8 bits of binary sum of all Transmit the MSB 

bytes from the command field to end code by two-digit 

hexadecimal number (0 – 9 and A – F). 

before the LSB. 

Command 3 No It is used to display the type of message (functions) and 

to specify the operation and response of the partner. 

Data 0 – n Yes It is the data part corresponding to a command. 

SAT, SET, DAT, RTY 

Abbreviate it when a command without data part is used. 

Details are described later. 

SDI, SDO 

End code 1 No It indicates the end of message. Not transmit a code 

(ETX) 

which is the same as an end code to data part. 

4.2 CODE SYSTEM 

Message 

Variable length (it can be omitted.) 

Sum Command Data part 

The communication codes between the remote buffer and host 

computer are described below: 

Field Command Code 

Related 

parameters 

Checksum --- ISO/ASCII 5000#2 

Command name --- ISO/ASCII 5000#2 

Data part 

DAT ISO/ASCII/EIA/Bin 0000#2 

Commands other 

than DAT 

ISO/ASCII 5000#2 

End code --- 

ISO/ASCII 5000#2 

CR/ETX 5000#3 

-14- 

/ 

/ 

1 byte 

ETX


4.3 COMMUNICATION SYSTEM 

ER 

RS 

CS 

SD 

RD 

SD 

CS 

RS 

RD 

Approximately 2 seconds 

It is used to perform communication between the remote buffer and 

host computer. When the both are ready to operate after power on, 

the communication starts from the transmission of remote buffer and 

reception of host computer and then the transmission/reception is 

repeated. 

t1 > ti n1 < 3 

t2 n2 

t3 

0 < t2 < To n2 < No Tx


(4) Switching from reception to transmission 

The remote buffer waits for Tx msec (parameter setting time) 

and moves to the transmission process after completion of 

reception. When there is no transmission after waiting another 

parameter (Tp seconds), it is considered that an error occurred in 

the remote buffer. 

(5) Overrun on reception 

When the RS signal is turned off by the remote buffer on 

reception of signal, stop the transmission within the overrun 

parameter number bytes by the host computer. 

(6) Overrun on transmission 

When the CS is turned off on transmission of remote buffer, the 

transmission is suspended within 3 bytes including that which is 

currently being transmitted. 

-16-


4.4 COMMAND 

4.4.1 Command Table 

Commands used in the protocol A are described below: 

Origin station R: Remote buffer H: Hoast computer 

Command 

Origin 

station 

Functions Data part 

Executed command 

at CNC side 

SYN R Initialization command 

It is used to command the initialization of host. 

Meaningless SYN 

H Response of SYN 

Response when the initialization does not end yet 

Initialization command 

It is command to initialize the remote buffer. 

Meaningless 

RDY R Notice of initialization end 

The host should respond the RDY in the case of end 

of initialization or the SYN when the initialization has 

not ended. 

Meaningless RDY, SYN 

H Notice of initialization end 

It is used to notice that the initialization of host has 

ended. 

Meaningless 

RST R Notice of CNC reset 

Immediately after the CNC is reset, transmit this 

command when it is possible to transmit signal. 

Meaningless ARS 

ARS H Response corresponding to the RST Meaningless 

ALM R Notice of CNC alarm occurrence 

When an alarm occurs in CNC, transmit this 

command when it is possible to transmit immediately 

after that. 

Meaningless AAL 

AAL H Response corresponding to the ALM Meaningless 

SAT R Notice of remote buffer status 

Status SET......... Normal 

It is used to notice the status of remote buffer by 

CLB 

transmitting it when there is no data to be especially 

RDI 

transmitted while the Tp sec has passed after 

SDO 

receiving the command. 

SYN 

SET H Response corresponding to the SAT 

Modification 

It is used to modify the setting parameter of remote 

buffer by specifying the data part. 

parameter 

GTD R Transmit command of NC data 

Meaningless DAT ........ Normal 

Transmit this command when the space of remote 

EOB ........ End 

buffer exceeds Nb bytes of parameter setting value 

WAT ....... Busy 

in the remote operation status. 

RDI 

SDO 

DAT H Response corresponding to the GTD 

Transmit this command with the NC data. 

NC data 

WAT H Response corresponding tot he GTD 

Transmit this command if the NC data cannot be 

transmitted within To when the GTD has been 

received. 

The GTD is transmitted again by the remote buffer 

after a parameter setting time of Tw. 

Meaningless 

-17-


Command 

Origin 

station 

Functions Data part 

Executed command 

at CNC side 

EOD H Response corresponding to GTD 

Transmit this command when the GTD has been 

received while the transmission of NC data has 

been completed. 

Meaningless 

CLB H Buffer clear 

It can be transmitted as the response of SAT when 

the buffer at the remote buffer side is to be cleared. 

Meaningless 

RDI H DI reading request 

It is used to request transmission of image of 

specified 8-bit DI. 

The DI image at that time is responded by the SDI 

command in the remote buffer. 

This command can be transmitted as responses of 

SAT and GTD. 

Meaningless 

SDI R Notice of DI 

DI image Response 

It is used to transmit the signal status of DI as the 

corresponding to the 

response of RDI command. 

The host should transmit the response of command 

received immediately before transmitting the RDI 

after receiving this command. 

GTD/SAT 

SDO H DO output request 

It is used to command that the 8-bit image of data 

part should be output to the DO. 

It can be transmitted as responses of SAT, GTD, 

and SDI. 

DO image 

RTY R/H Request of retransmission 

Reason for Command 

It is used to request the retransmission of the same retransmission transmitted 

message as before. 

Immediately transmit this command when a 

transmit error is detected during reception of 

messages. 

immediately before 

-18-


4.4.2 Description of Data Part 

Data part of message is of variable length. Up to 4096 and 72 bytes 

can be received/transmitted in the case of and the others, 

respectively. 

1) Data part of SAT 

Byte 

position 

Meaning and code 

Default value 

(hexadecimal) 

1 Switching of remote/tape operations 

According to parameter (Data No. 5000, #1) 

setting. (*C) 

0 

2 Status of remote buffer 

0: Non-completion status of operation 

preparation 

1: Reset status 

2: Operation status 

3: Alarm status 

4: Open line 

0 

3 Causes of shift to alarm status 

0: NC alarm 

1: Checksum error (retry over) 

6: Reception of unexpected response 

(command error) 

A: Overrun error (retry over) 

0 

4 Not used --- 

5 - 8 Number of bytes currently stored in the buffer 

(Four-digit hexadecimal number) 

0000 

9 - 12 Current value of parameter Nb 

Empty area limit of buffer 


07D0 

13 - 16 Current value of parameter No 

Amount of maximum overrun on reception 


0032 

17 - 20 Current value of parameter No 

Number of times of retry on detecting a 

transmission error (Four-digit hexadecimal 

number) 

000A 

21 - 24 Current value of parameter Tp 

Polling time interval (second) 


0005 

25 - 28 Current value of parameter To 

Time-out time (second) 


0014 

29 - 32 Current value of parameter Ti 

Minimum time interval between bytes 

transmitted (Four-digit hexadecimal number) 

000A 

33 - 36 Current value of parameter Tx 

Minimum switching time from reception to 

transmission (Four-digit hexadecimal number) 

0064 

37 - 40 Current value of parameter Tw 

Waiting time on reception of (WAT) 


0005 

-19-


Byte 

Meaning and code 

position 

41 - 44 Unit for the boring time (four digits in 

hexadecimal) 

Setting parameter P2 to 1 sets the unit for the 

boring time to 0.1 seconds. 

15 0 

0000000000000P200 -20- 

Default value 

(hexadecimal) 

0000 

45 - 46 Note) 

Code to be converted (two-digit hexadecimal 

number) 

00 

47 - 78 Note) 

Code after conversion (two-digit hexadecimal 

number) 

00 

49 - 54 Reserve --- 

55 - 56 Packet length parameter n of expansion 

protocol A (two-digit hexadecimal number) 

00: Normal protocol A 

01: Expansion protocol A 

NC data length = 256 bytes 

Packet length = 260 bytes 







00 

57 - 72 Not used --- 

NOTE 

Bytes 45, 46, 47, and 48 of SAT 

These bytes contain the parameters necessary for the 

remote buffer to convert the protocol A command 

data and expansion protocol A data in the specified 

section. Specify the code to be converted in bytes 45 

and 46. Specify the code to which conversion is to be 

performed in bytes 47 and 48. For details, refer to 

Section 4.4.2 (3).


SUM DAT 

a) Protocol A 

b) Expansion protocol A 

Section to be converted 

// 

 

The host computer handles an EOB code in an NC program as “;” and 

transmits it to the CNC as is. When ‘3’ and ‘B’ (= 3BH) are specified 

in SET command bytes 45 and 46, and ‘ ’ and ‘A’ (= 0AH) are 

specified in bytes 47 and 48, “;” is converted to “LF” which is then 

transmitted to the CNC. 

2) Data part of SET 

The format of data part of command is the same as that 

of data part of except the following points. 

Data part can be abbreviated when no parameter is modified. 

Byte 

position 

Meaning and code Remarks 

1 Switching request of remote/tape operations 

2 Status of host computer Ignore 

3 - 8 Not used 

9 - 48 Modified value of parameter 


55 - 56 Parameter for expansion protocol 


3) Data part of DAT 

Section to be converted 

Up to 4096 bytes of NC data can be received at the data part of 

command . 

Transmit the NC data depending on the specifications of NC 

since no data process is performed in the remote buffer other 

than the conversion code set by the parameter. 

Also, always add the EOR code to the end of NC program. 

-21- 

// 

Data ETX 

// 

Data No SUM ETX 

//


4) Data part of SDI 

Byte 

position 

Meaning 

1 - 2 2-byte hexadecimal display of 8-bit contents of DI 

(PMC address: G152) 

3 - 72 Not used (it can be omitted.) 

1) Data part of SDO 

Byte 

position 

Meaning 

1 - 2 2-byte hexadecimal display of 8-bit contents of DO 

(PMC address: F152) 


6) Data part of RTY 

Byte 

Meaning 

position 

1 Reason for requesting retransmission 

1: Checksum error 

3: Overrun error (Data received after RS has been turned off) 


7) Data part of other commands 

Byte 

position 

Meaning 

1 - 72 Not used (it is generally omitted.) 

-22-


4.5 PARAMETER TABLE 

Parameters which can be set in the data part of SET command are 

shown as below: 

Parameter Meaning Unit Range 

On turning 

on power 

Nb Number of bytes of minimum buffer empty area on transmission of 

GTD 

(Note 1) 

Byte 1 - 4000 2000 

No Maximum amount of overrun on reception of data Byte 2 - 2000 50 

Ne Number of retry times on detection of transmission error Times 0 - 100 10 

Tp Polling time interval Sec 1 - 99 5 

To Time-out time Sec 1 - 999 20 

Ti Minimum time interval between transmission bytes msec 0 - 10 

(Note 2) 

10 

Tx Minimum switching time from reception to transmission msec 0 - 100 100 

Tw Wait time on reception of WAT Sec 0 - Tp 5 

NOTE 

1 Setting value l+No≤Nb≤4000 (l : Data length for DAT 

command) 

2 2 msec step 

-23-


4.6 ERROR PROCESS 

1) Open-line error 

When the following error occurs, it may be an open line error. 

Restart the initialization of remote buffer for recovering the line. 

When the line is recovered, it waits for transmission of SYN and 

is SYN wait status. 

The procedures are the same as those of initialization on power 

on other than continuation or SYN of host computer. 

(1) Framing error 

(2) Overrun error 

(3) Parity error 

(4) Data Set Ready off 

(5) Buffer full (the transmission stop request is unacceptable.) 

(6) Time out 

(7) Number of retry times has been exceeded. 

2) Reception error 

Ignore the reception data and restart the reception of SAT 

command at the remote buffer side when the following errors 

occurs. 

(1) Number of retry times exceeded 

Number of RTY reception times + Number of 

retransmission by checksum error > Ne 

(2) Command error 

Message format error 

Reception of undefined command 

Reception of unexpected command 

(3) Overrun 

This results if the transmission stop request is not accepted 

and the reception buffer is overflown. 

3) Reception during transmission 

Data received during transmission is ignored. 

-24-


4.7 STATUS TRANSITION 

The status transition diagram of remote buffer is shown as below: 

Turning on power 

Non-completed status of 

operation preparation 

0 

SYN reception RDY reception 

NC reset 

EOD reception 

Reset status 

1 

Remote operation 

status 

2 

NOTE 

1 Causes of line error 

(1) DR off 

(2) Number of retry times over 

(3) Time out 

(4) Buffer full 

2 Reception error 

(1) Undefined command 

(2) Unexpected command 

(3) Number of retry times over by sum error 

(4) Overrun 

-25- 

GTD 

transmission 

Line error Note 1 

NC reset 

Reception error 

NC alarm 

Line error 

Reception error 

NC alarm (Note 2) 

Open line status 

4 

Alarm status 

3 

After 2 msec 

Line error 

(Note 1)

5. EXPANSION PROTOCOL A B-63322EN-1/01 

5 EXPANSION PROTOCOL A 

It allows the NC data between the remote buffer and host computer to 

be efficiently transferred by adding the high-speed reception function 

to the protocol A. 

-26-

B-63322EN-1/01 5. EXPANSION PROTOCOL A 


The expansion protocol A is the same as the protocol A excluding the 

transmission of NC data. 

The expansion protocol A mode is initiated after the is output 

to the host computer by the remote buffer according to the data 

request from the CNC side. 

The communication system is performed in the full duplex mode in 

the expansion protocol A. The NC data transmitted is packeted and is 

transmitted to the remote buffer by the host computer. Also, perform 

the reception process of monitor packet from the remote buffer. 

Protocol 

A 

mode 

-27- 

GTD transmission 

End packet 

Mode transition 

Expansion 

protocol A 

mode 

Packet transmission/ 

reception


5.2 DATA PACKET FORMAT 

The NC data is transferred to the remote buffer using the following 

format by the host computer after receiving the . 

When the NC data transmitted becomes multiple packets, the packets 

can be transmitted in order without waiting the response from the 

remote buffer by the host computer. 

NC data 

1) NC data 

The NC data is the fixed length of “256*n” bytes and the n is 

specified with the parameter (byte position 55 to 56) by the 

command. 

The default value of n is 0. In the case of “n = 0”, the normal 

protocol A is used. 

n = 0 : Normal protocol A 

n = 1, 2, 4 : Expansion protocol A 

NOTE 

Note that n is set to 0 automatically even if n is set to the 

values other than listed above. 

2) Packet No. 

( "256*n" byte ) 

Calculation range of checksum 

a) Effective packet : 30h – 39h (ASCII code) 

Be sure to assign packet No. 30h to the first packet. If there 

is only one effective packet, assign FFh to the packet, since 

it is not only the first but also the last packet. 

If there is more than one effective packet, packet No. 30h is 

transmitted to the host computer by the remote buffer, along 

with the monitor packet of retransfer request. 

Hereafter, the value incremented by 1 should be the packet 

No. 

However, the value next to 39h becomes 30h. 

If there is only one packet, the packet is both the first and 

the last; be sure to assign FFh. 

Also, when the loss or improper order of packet No. is 

detected, the improper packet No. is transmitted to the host 

computer along with the monitor packet No. . 

When the checksum error is detected, the improper packet 

No. is transmitted to the host computer with the monitor 

packet of retransfer request by the remote buffer. 

-28- 

Packet 

No. 

(1 byte) 

Checksum 

(2 byte) 

End code 

(1 byte)


b) End packet : FFh 

The end packet is transmitted by setting the packet No. to 

FFh. The data part of end packet is considered to be the 

effective data. However, the end packet received after 

transmitting ignores the data part. 

This allows the expansion protocol A mode to be ended and 

the normal protocol A mode is initiated. 

However, when the checksum error is detected at the end 

packet, the before packet No. +1 is transmitted as the end 

packet No. to the host computer with monitor packet 

of retransmission request. (Note) 

The host computer should shift to the protocol A when the 

command of protocol A is received after transmitting the 

end packet. 

NOTE 

If FFh is assigned to the first packet, packet No. 0 is 

transmitted to the host computer with , since this 

packet is the last packet. 

c) Invalid packet : Other than above 

Transmit this invalid packet with the dummy data of 

“256*n” bytes when the time out may occur since time is 

required for editing of NC data transmitted by the host 

computer. 

The remote buffer is processed as an invalid packet. 

3) Checksum 

The checksum is obtained by adding the NC data to the packet 

No. in units of byte and then expressing the 1 byte data produced 

by neglecting the overflow above 8 bits out of the total value 

above using ASCII 2-byte code. 

4) End code 

The end code should be the ASCII code CR (0Dh). 

-29


5.3 MONITOR PACKET FORMAT 

The monitor packets transmitted from the remote buffer to the host 

computer are shown as below. All packets have the fixed length 

consisting of 5 bytes. 

1) Stop request 

CAN 

( 18h ) 

The stop request is transmitted to the host computer by the 

remote buffer when resetting the NC and stopping data reception 

by an alarm. 

Transmit the end packet (the NC is dummy) after transmitting 

the packet which is currently being transmitted and move to the 

normal protocol A mode when this packet is received by the host 

computer. 

If the end packet was being transmitted when the CAN packet 

was received, the end packet need not be retransmitted in 

response to CAN. 

Transmit the end packet even in the DC3 reception status. 

2) Retransmission request 

NAK 

( 15h ) 

When a check sum error is detected in the received packet, the 

retransmission request corresponding to the packet is transmitted 

by the remote buffer. 

The host computer should perform retransmission from the 

corresponding packet immediately after ending the transmission 

of packet which is currently being transmitted when it receives 

this packet. 

-30- 

Meaningless 

(20h ) 

Packet No. 

(1 byte) 

Checksum 

( 2 b y t e ) 

Checksum 

( 2 b y t e ) 

End code 

( 0Dh ) 

End Code 

(0Dh )


3) Interruption request 

DC3 

(93h ) 

The interruption request is transmitted to the host computer by 

the remote buffer when the reception buffer may become 

overflown. 

The host computer should interrupt the transmission and wait 

until the next monitor packet is received after completing the 

transmission of packet which is currently being transmitted when 

it receives this packet. 

4) Restart request 

DC1 

( 11h ) 

The restart request is transmitted to the host computer by the 

remote buffer when there is space in the reception buffer after 

requesting interruption. 

The host computer should restart the transmission from the next 

packet following the interrupted one when this packet is 

received. 

-31- 

Meaningless 

( 20h ) 

Meaningless 

( 20h ) 

Checksum 

( 2 b y t e ) 

Checksum 

( 2 b y t e ) 

End code 

(0Dh ) 

End code 

(0Dh )


5.4 COMMUNICATION EXAMPLE 

Remote buffer 

1) Normal 

< GTD > 

Packet (0) 

Packet (1) 

Packet (2) 

Packet (3) 

End packet (0FFh) 

< SAT > 

< SET > 

-32- 

Host computer


Remote buffer 

RESET 

2) Stop request 

< GTD > 

Packet (0) 

Packet (1) 

Packet (2) 

End Packet (0FFh) 

< RST > 

< ARS > 

< SAT > 

< SET > 

-33- 

"CAN" 

(Dummy data) 

Host computer


Remote buffer 

Checksum error 

detection 

3) Retransmission (i) 

< GTD > 

Packet (0) 

Packet (1) 

Packet (2) 

Packet (1) 

Packet (2) 

Packet (3) 


< SAT > 

< SET > 

-34- 

"NAK" (1) 

Host computer 

Retransmit from 

the packet (1)


Remote buffer 


detection 

3) Retransmission (ii) 

< GTD > 

Packet (0) 

Packet (1) 

Packet (2) 

Packet (3) 


"NAK" (4) 


< SAT > 

< SET > 

-35- 

Host computer


Remote buffer 

Packet No. 

Out-of-order 

detection 

Packet No. 

Out-of-order 

detection 

3) Retransmission (iii) 

< GTD > 

Packet (1) 

Packet (2) 

Packet (0) 

Packet (1) 

Packet (3) 


Packet (2) 

Packet (3) 

< SAT > 

< SET > 

-36- 

"NAK" (0) 

" NAK" (2) 


Host computer


Remote buffer 

Empty buffer 

Remaining 

less than 

2 Packet s 

Empty buffer 

Remaining 

more than 

3 Packet s 

4) Interruption → Restart 

< GTD > 

Packet (0) 

Packet (1) 

Packet (2) 

Packet (3) 

" DC1" 


< SAT > 

< SET > 

-37- 

"DC3" 

Host computer


Remote buffer 

Empty buffer 

Remaining 

one block 

RESET 

5) Interruption → Start 

< GTD > 

Packet (0) 

Packet (1) 

Packet (3) 

"CAN " 

End Packet (0FFH) 

< RST > 

< ARS > 

< SAT > 

< SET > 

-38- 

"DC3" 

(Dummy data) 

Host computer 

Transmit the end 

packet for ending 

the expansion 

protocol A although 

the DC3 is 

currently being 

received.


Remote buffer 

Empty buffer 

Remaining 

one block 


detection 

Empty buffer 

Remaining 

two blocks 

6) Interruption → Retransmission 

Packet (2) 

< GTD > 

Packet (0) 

Packet (1) 

"DC3" 

"NAK" (2) 

Packet (2) 

"DC1" 

Packet (3) 


< SAT > 

< SET > 

-39- 

Host computer 

Transmit only an 

error packet since 

the DC3 is receiving 

data. 

Restart transmission 

of packets following 

this after receiving 

DC1.


Remote buffer 

Time-out 

detection 

7) Time-out detection 

< GTD > 

Packet (0) 

< SYN > 

< SYN > 

< RDY > 

< RDY > 

< SAT > 

< SET > 

NOTE 

The time-out monitoring period lasts until the next one 

packet is received immediately after output of . 

After that, it is the time between reception of one packet 

and that of another. 

-40- 

Host computer

B-63322EN-1/01 6. PROTOCOL B 

6 PROTOCOL B 

The protocol B is used to control the communication between the 

remote buffer and host computer by the control code. 

-41-

6. PROTOCOL B B-63322EN-1/01 


The communication system can be in either of two settings, one in 

which the CNC reset/alarm state is posted to the host and the other in 

which it is not posted. When ETX (bit 3 of parameter No. 5000) is 1, 

the system is in the setting in which the state is posted. 

6.1.1 When the CNC Alarm/Reset is not Posted to the Host 

ER (output) 

RS (output) 

SD (output) 

RD (input) 

DR (input) 

CS (input) 

1) When the remote buffer receives data 

The remote buffer requests the host computer to send data. 

10 ms or more 100 ms or more 

1 ms or more 

DC1 

DC3 

(1) The remote buffer transmits the DC1 code. 

(2) The host computer starts to transmit the DC3 code to the 

remote buffer by the DC1 code. 

(3) When the empty area of remote buffer area becomes the 

value specified, the DC3 code is transmitted. 

(4) The host computer should stop transmission to the remote 

buffer by the DC3 code. The overrun value is specified 

later. 

(5) The remote buffer transmits the DC1 code when the 

remainder of buffer data becomes less than the level 

specified and requests the host computer to start 

transmitting data. 

(6) The host computer should start transmitting data again by 

the DC1 code. The transmission data is a continuation of 

previous data. 

-42- 

DC1 

Overrun 

DC3 

ER code


ER (output) 

RS (output) 

SD (output) 

DR (input) 

CS (input) 

ER (output) 

RS (output) 

SD (output) 

RD (input) 

DR (input) 

CS (input) 

(7) The remote buffer transmits the DC3 code when the data 

read is completed. The end of data read is indicated by the 

detection of ER or NC reset. 

(8) The host computer stops transmission of data. 

2) When the remote buffer sends data (punch-out) 

(Fig. A) 


1 ms or more 

DC2 

2 characters or less 

(Fig. B) 


1 ms or more 

DC2 

DC3 DC1 

Overrun 

-43- 

DC4 

DC4



(2) The remote buffer then transmits punch-out information. 

(3) If the processing speed of the host computer is not high 

enough to handle arriving data, perform one of the 

following: 

(a) Turn the CS signal of the remote buffer off. The 

remote buffer stops data transmission within two 

characters including the character being sent. (See Fig. 

A.) 

(b) Send a DC3 code to the remote buffer. The remote 

buffer stops data transmission within the overrun, 

which will be explained later, from the point when 

DC3 is sent. To make the remote buffer resume data 

transmission, send a DC2 code to the remote buffer. 

(See Fig. B.) 

(4) When the host computer completes data processing, turn 

the CS signal of the remove buffer on. Then, the remote 

buffer sends the data following the previous data. 

(5) When data transmission is completed, the remote buffer 

sends the DC4 code. 

6.1.2 When the CNC Alarm/Reset is Posted to the Host 

When the remote buffer becomes ready after the power is turned on, 

the remote buffer turns the ER signal on, and keeps the ER signal on 

until the power is turned off. When an alarm occurs in the NC, the 

NAK code is sent to the host computer, and when the NC is reset, the 

SYN code is sent to the host computer. This is not performed, 

however, if the host computer is not ready for reception (each of the 

DR, CD, and CS signals is on). 

-44-


ER (output) 

RS (output) 

SD (output) 

RD (input) 

DR (input) 

CD (input) 

CS (input) 

ON 

ER (output) 

ON 

RS (output) 

SD (output) 

RD (input) 

DR (input) 

CD (input) 

CS (input) 

1) When the remote buffer is neither receiving nor transmitting data 

CNC power-on Reset or alarm Reset or alarm Reset or alarm 

(1) 

DC1 

Ignored period Valid period Ignored period 

The “SYN” or “NAK” code is output upon reset of the CNC or the 

detection of a CNC alarm, but only during the valid period shown in 

the above figure. 

2) When the remote buffer is receiving or transmitting data 

 

-45- 

SYN or NAK 

(3) 

DC3 

Reset or alarm 

(5) 

DC1 

(7) 

DC3 

(2) (4) (6) (8) 

SYN or 

NAK


ON 

ER (output) 

ON 

RS (output) 

SD (output) 

DR (input) 

CS (input) 

DC2 

(1) 

(2) 


(2) Upon receiving the DC1 code, the host computer shall start 

transmitting data to the remote buffer. 

(3) Once the amount of free space in the remote buffer falls below 

the specified value, the remote buffer transmits the DC3 code. 

(4) Upon receiving the DC3 code, the host computer shall stop 

transmitting data to the remote buffer. 

(5) Once the amount of data in the remote buffer falls below the 

specified value, the remote buffer transmits the DC1 code to 

request that the host computer restart data transmission. 

(6) Upon receiving the DC1 code, the host computer shall restart 

data transmission, picking up from the data immediately after 

that transmitted last. 

(7) When the CNC has been reset or an alarm has been issued in the 

CNC, the remote buffer transmits, to the host computer, the DC3 

code, followed by the SYN code (for reset) or NAK code (for an 

alarm). Thus, data reading is terminated. 

(8) The host computer shall stop data transmission. 

 

(Fig. A) 

(3) (4) 

-46- 


DC4 (5) SYN or 

NAK 

If a CNC reset or CNC alarm occurs during 

this period, DC4, SYN, or NAK is not 

transmitted.


ON 

ER (output) 

ON 

RS (output) 

SD (output) 

RD (input) 

DR (input) 

CS (input) 

DC2 

(1) 

(2) 

(Fig. B) 

DC3 DC1 

(3) 

(4) 


(2) The remote buffer starts transmitting punch-out data. 

(3) If data processing in the host computer cannot keep pace with 

the rate of data transmission from the remote buffer: 

(a) Turning off the CS signal for the remote buffer causes the 

remote buffer to stop data transmission after transmitting a 

maximum of most two characters, including the character 

currently being transmitted. (See Fig. A.) 

(b) Transmitting a DC3 code to the remote buffer causes the 

remote buffer to stop data transmission, such that the 

amount of data transmitted after transmission of the DC3 

code does not exceed the overrun. (See Fig. B.) 

NOTE 

If the RBETX bit of parameter No. 5000 is set to 1, 

method (a) cannot be used because, while the CS signal 

is off, a SYN/NAK or DC4 code is not transmitted even if 

CNC reset or a CNC alarm occurs. In such a cause, use 

method (b). 

(4) For method (a) in step (3) 

Once data processing by the host computer terminates, turning 

on the CS signal for the remote buffer causes the remote buffer 

to restart data transmission, picking up from the data 

immediately after that transmitted last. 

For method (b) in step (3) 

Transmitting a DC1 code to the remote buffer causes the remote 

buffer to restart data transmission. 

(5) When the CNC has been reset or an alarm has been issued in the 

CNC, the remote buffer transmits, to the host computer, a DC4 

code, followed by a SYN code (for reset) or NAK code (for an 

alarm). 

-47- 


DC4 

(5) 

SYN or 

NAK


6.2 CONTROL CODE 

6.3 BUFFER CONTROL 

Protocol Interface MAX baud rate 

DC3 transmission 

conditions 

Protocol B RS-232-C 19200 Remaining characters = 4096 

characters 

Allowable 

overrun value 

Less than 512 

characters 

Less than 2560 

characters


6.4 ALARM AND RESET OF CNC 

Once an alarm has been issued in the CNC, or upon the CNC being 

reset, the remote buffer transmits the DC3 code, then: 

(1) When the CNC reset/alarm state is not to be posted to the host 

(parameter No. 5003 bit 3 = 0) 

Turns off the ER signal, then performs close processing. 

(2) When the CNC reset/alarm state is to be posted to the host 

(parameter No. 5003 bit 3 = 1) 

Transmits the “SYN” or “NAK” code to the host, then performs 

close processing. 

NOTE 

1 When the parameter is set to post the CNC reset/alarm 

to the host, the CNC terminates communication upon the 

occurrence of an alarm in the CNC during 

communication in either of the following cases: 

(1) For foreground operation: The reset key or the STOP 

key (soft key) is pressed. 

(2) For background operation: The STOP key (soft key) 

is pressed. (A reset does not cause communication 

to terminate.) 

2 When the remote buffer transmits data (for punch-out), 

pressing the STOP soft key of the CNC cannot stop the 

data transmission until all the buffered data between the 

CNC and remote buffer has been transmitted to the host 

computer. 

To stop data transmission immediately, press the RESET 

key. 

-49-

7. EXPANSION PROTOCOL B (RS-422) B-63322EN-1/01 

7 EXPANSION PROTOCOL B (RS-422) 

TR (output) 

RS (output) 

SD (output) 

RD (input) 

RR (input) 

CS (input) 

TR (output) 

RS (output) 

SD (output) 

RD (input) 

RR (input) 

CS (input) 

DC1 

DC2 

The expansion protocol B is a protocol used to enable high-speed 

transmission with a simple protocol. The communication system is 

the same as that of protocol B. 

However, the overrun value after transmission of DC3 is limited to 

1280 characters or less to enable high-speed transmission. 

* When the remote buffer receives data 

DC3 

* When the remote buffer transmits data 

-50- 

DC1 DC3 

ER code 

2560 characters or less 2560 characters or less 

DC3 

2560 characters or less 

DC1 

DC4

B-63322EN-1/01 8. DATA INTERFACE 

8 DATA INTERFACE 

-51-

8. DATA INTERFACE B-63322EN-1/01 

8.1 DATA PART 

Data received from the host computer is largely classified into two 

parts, namely the control part and data part. 

With the protocol B/expansion protocol B, all data received from the 

host computer become the data part. 

See the following figure for the data part of protocol A/expansion 

protocol A. 

1) Protocol A 

Packet configuration of 

Control part Data part 

/ 

ETX 

Sum Command Data 

/ 

ETX 

8.2 INTERFACE OF DATA PART 

2) Expansion protocol A 

Configuration of response packet for 

Data part 

/ 

Control part 

Data 

No. Sum 

/ 

The interface of data part is in conformity the provisions of data 

which can be handled through the serial port by the CNC. 

The end of data part is judged by the detection of EOR code. Also, 

all data after EOR code is ignored. 

In general, the data part configuration is as shown below. However, 

in the case of DNC operation, the data already received will be lost by 

the CNC reset. 

Significant information 

% ; Program-1 M02 ; Program-2 M02 ; .... ; Program-N M02 ; % 

-52- 

ETX

B-63322EN-1/01 9. BINARY INPUT OPERATION FUNCTION 

9 BINARY INPUT OPERATION FUNCTION 

-53-

9. BINARY INPUT OPERATION FUNCTION B-63322EN-1/01 

9.1 FUNCTION EXPLANATION 

High 

byte 

byte 

Low 

byte 

High 

byte 

Once a single "G05;" block is specified in normal NC command 

format, operation can be performed by specifying desired move data 

and auxiliary functions in the following format. 

By specifying zero for all of the travel distances along all axes and the 

auxiliary function, the system subsequently accepts commands in 

normal NC command format again.. 

• Binary input operation on: G05; 

• Binary input operation off: Zero specified for all of the travel 

distances along all axes and the auxiliary function 

Low 

byte 

Host computer 

• Data format for binary input operation 

• • • 

-54- 

High 

byte 

RS232C or 

RS422 

First axis Second axis N-th axis Auxiliary function 

Order of data items 

Low 

byte 

Fourth 

byte 

• • • 

CNC 

(FS15i) 

Remote buffer 

First 

byte 

Check 

byte 

(1) In this format, the travel distance per unit time along each axis 

(two bytes) is arranged for all axes, starting with the first axis, 

followed by an auxiliary function (four bytes. See (6).) and by 

the check byte (one byte). 

(2) The unit time in msec can be specified with bits 0, 1, and 2 of 

parameter No. 7618. 

(3) All data must be in binary representation.


(4) The travel distance along each axis must be specified in the 

following units. (Negative travel distances must be in two’scomplement 

form.) 

Millimeter 

machine 

Inch 

machine 

Rotation 

axis 

IS_A IS_B IS_C IS_D IS_E Unit 

0.01 0.001 0.0001 0.00001 0.000001 mm 

0.001 0.0001 0.00001 0.000001 0.0000001 inch 

0.01 0.001 0.0001 0.00001 0.000001 deg 

(5) The following data formats can be selected for the travel 

distance, using RDS (bit 2 of parameter No. 7609). (Specify the 

travel distance per unit time using the bits marked with the 

asterisk (*).) 

• Special format (bit 2 of parameter No. 7609 = 0) 

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 

* * * * * * * 0 * * * * * * * 0 

• General format (bit 2 of parameter No. 7609 = 1) 

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 

* * * * * * * * * * * * * * * * 

(Example) If the travel distance per unit time is 700 microns 

(Millimeter machine, unit: IS_B.) 


15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 

0 0 0 0 1 0 1 0 0 1 1 1 1 0 0 0 


15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 

0 0 0 0 0 0 1 0 1 0 1 1 1 1 0 0 

NOTE 

For the protocol A, the data format for the travel distance 

must always be the special one. 

(6) Whether to use auxiliary functions can be specified with RAX 

(bit 3 of parameter No. 7609). 

• Bit 3 of parameter No. 7609 = 0 … 

Does not use auxiliary functions. 

(The data length is [2 * N + 1] bytes.) 

-55-


• Bit 3 of parameter No. 7609 = 1 ... 

Uses auxiliary functions. 

(The data length is [2 * N + 5] bytes.) 

(7) When the parameter is set to use auxiliary functions, specify the 

auxiliary functions to be used, using parameter No. 2034, as 

follows: 

• "0"... Second auxiliary functions 

• "1"... Miscellaneous functions 

• "2"... S functions 

• "3"... T functions 

(8) The following data formats can be selected for the auxiliary 

function, using RDS (bit 2 of parameter No. 7609). (Specify 

data using the bits marked with the asterisk (*) and specify 

whether the data is significant using the MSB.) 


15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 

* * * * * * * 0 * * * * * * * 0 

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 

* * * * * * 0 * * * * * * * 0 

MSB = 1: The data is significant. 

MSB = 0: The data is not significant. 


15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 

* * * * * * * * * * * * * * * * 

31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 

* * * * * * * * * * * * * * * 

MSB = 1: The data is significant. 

MSB = 0: The data is not significant. 

When the MSB is 1, the data specified with the bits marked with the 

asterisk (*) is sent to the auxiliary function, described above. 

After the time set for parameter No. 2010 has elapsed, a strobe signal 

is sent for the time set for parameter No. 2012. The system does not, 

however, wait for FIN. 

(9) The check byte must be the result of adding together all the other 

[2 * N + (0 or 4)] bytes in byte-by-byte basis, with any overflows 

of 8 bits or more removed. 

-56-


9.2 TRANSFER RATE 

After every unit time set for the appropriate parameter, the CNC 

extracts data of 2 * N + n bytes (where N is the number of axes, n is 

equal to 1 when auxiliary functions are not used and 5 when they are 

used.) from the remote buffer. To achieve smooth machining without 

any interruption of pulse distribution during machining, the baud rate 

of transfer between the host computer and the remote buffer must be 

at least 

(2 * N + n) * 11/T * 1000 (bps) (where T is the unit time.). 

For example, when three axes are used, auxiliary functions are not 

used, and the unit time is 2 msec, 

the baud rate must be at least 

(2 × 3 + 1) bytes × 11 bits/byte/2 msec × 1000 = 38500 bps. 

-57-


9.3 NOTES 

NOTE 

1 In binary input operation mode, any modal commands (such 

as G00, G02, G03, and G90) before the G05 block are 

disabled, and are executed as linear interpolation G01 based 

on the command data format (equivalent to linear incremental 

commands). Upon leaving binary input operation mode, the 

system accepts modal commands as usual again. 

2 An alarm is issued if G05; is specified in the following modes: 

Cutter compensation, three-dimensional cutter compensation, 

interrupt macro, canned cycle, three-dimensional coordinate 

conversion, coordinate conversion, programmable mirror 

image, scaling, polar coordinate interpolation, polar 

coordinate command, normal direction control, hypothetical 

axis interpolation, cylindrical interpolation, constant surface 

speed control, spindle speed fluctuation detection 

3 In binary input operation mode, single blocks are 

disabled. By setting G5S (bit 3 of parameter No. 2007) 

to 1, they are enabled. 

4 Feed hold and interlocking are enabled. 

5 Turning mirror images on and off is enabled even in 

binary input operation. 

6 Program restarts and block restarts cannot be used. 

7 Registration in memory is not possible. 

8 In binary input operation mode, acceleration/deceleration 

after interpolation is subject to the acceleration/ 

deceleration in cutting feed mode (G01). 

9 The action to be taken when manual intervention is 

performed in binary input operation mode does not follow 

ABS (bit 3 of parameter No. 2409), but the action in the 

manual/absolute off state (the travel due to the 

intervention is not regained at a restart) is always 

assumed. In a mode other than binary input operation 

mode, ABS (bit 3 of parameter No. 2409) is effective. 

10 If binary input operation is performed when acceleration/ 

deceleration before look-ahead interpolation or fine HPCC is 

enabled, acceleration/deceleration before look-ahead interpolation 

or fine HPCC remains enabled. In operation with the 

unit time shorter than 8 msec, acceleration/deceleration before 

look-ahead interpolation or fine HPCC must be enabled. 

Only when the unit time is 1 msec (2 msec for a system 

with 11 or more controlled axes), acceleration/deceleration 

before look-ahead interpolation or fine HPCC can be 

disabled in binary input operation mode by setting G5H (bit 

3 of parameter No. 7713) to 1. Even in this case, 

however, acceleration/deceleration before look-ahead 

interpolation or fine HPCC must be enabled. 

11 In binary input operation mode, it is not possible to 

perform intervention through MDI operation. 

-58-

B-63322EN-1/01 10. PARAMETER 

10 PARAMETER 

The following describes the parameters related to the remote buffer. 

#7 #6 #5 #4 #3 #2 #1 #0 

0000 XXX EIA NCR ISP CTV TVC 

[Input section] Setting input 

[Data type] Bit type 

#0 TVC Specifies whether TV check is performed. 

0: Do not perform. 

1: Perform. 

#1 CTV Specifies whether characters are counted for TV check 

during control out. 

0: Count. 

1: Do not count. 

#2 ISP Specifies whether ISO codes contain a parity bit. 

0: Contain parity bit. 

1: Do not contain parity bit. 

A parity bit is located at channel 8 in a punched tape in 

the ISO code. 

#3 NCR Specifies how to punch an EOB (end-of-block) code 

when using ISO codes. 

0: Punch LF CR CR. 

1: Punch LF. 

#4 EIA Specifies the code system to use for punch codes. 

0: ISO code 

1: EIA code 

#5 XXX This parameter bit must always be set to 0. 

-59-

10. PARAMETER B-63322EN-1/01 

10.1 INPUT DEVICE NUMBER 

0020 Interface number of input device for foreground 

[Input type] Setting input 

[Data type] Integer 

[Valid data range] 0 to 16 

Set the interface No. of an input device for the foreground. 

For the remote buffer, set a value of 10. 

0021 Interface number of output device for foreground 




Set the interface No. of an output device for the foreground. 


0022 Interface number of input device for background 




Set the interface No. of an input device for the foreground. 


0023 Interface number of output device for background 




Set the interface No. of an output device for the foreground. 


-60-


10.2 EXCLUSIVE PARAMETER FOR REMOTE BUFFER 

#7 #6 #5 #4 #3 #2 #1 #0 

5000 0 CDC ETX TCC ECH 422 

[Input type] Parameter input 

[Data type] Bit 

NOTE 

When this parameter is specified, the power must be 

turned off and then on again for the parameter settings to 

take effect. 

#0 422 : Interface between the host and remote buffer 

0 : RS-232-C 

1 : RS-422 

The system determines whether the remote buffer board 

is provided with an RS-232-C or RS-422 interface, and 

automatically sets the appropriate value. 

#1 ECH : The response of the SAT at the switching between 

remote operation and DNC operation is (for the protocol 

A only): 

0 : Always transmit 0 to SAT data part (Byte position 1) 

1 : Echo back SET data part (Byte position 1) to SAT 

data part (Byte position 1) 

#2 TCC : Communication code 

Communication code for protocol A 

0 : ASCII 

1 : ISO 

Communication code for protocol B/expansion protocol 

B (DC1, DC2, DC3, DC4, SYN, NAK) 

0 : ISO 

1 : ASCII 

#3 ETX : For protocol A, the message end code is: 

0 : CR code of ASCII/ISO 

1 : ETX code of ASCII/ISO 

(ASCII or ISO is selected by using the parameter 

TCC.) 

For protocol B or expansion protocol B, the remote 

buffer: 

0 : Does not post notification of CNC reset or an alarm 

to the host computer. 

1 : Transmits the SYN code for CNC reset, or the NAK 

code for a CNC alarm. 

-61-


5070 




When this parameter is set to 1, the settings of the 

following parameters also became effective when the 

power is turned off, then back on: 

No. 5070, 5072, 5073, 5082, 5083 

#4 CDC : CD (Signal quality detection) for RS-232-C interface 

0 : is checked 

1 : is not checked 

Minimum baud rate for receiving reception clock from the other device 

(Remote buffer RS-422 only) 

Boundary value at which the clock received by the CNC is to be 

synchronized with the host clock. 

1: 50 9: 2400 

2: 100 10: 4800 

3: 110 11: 9600 

4: 150 12: 19200 

5: 200 13: 38400 [bps] 

6: 300 

7: 600 

8: 1200 

When using PROGRAM FILE Matc, set 13. 

NOTE 

1 At 38400 bps or higher, the received clock must always 

be synchronized. If the transfer rate exceeds this 

parameter, the clock received by the CNC is 

synchronized with the clock on the host. 

(They are synchronized when the setting of parameter 

No. 5073 is equal to or more than the setting of 

parameter No. 5070.) 

2 Using the RS-422 interface enables asynchronous 

communication to be performed at high speed because 

the transmission clock obtained from the transmitting 

station is used as the reception clock by the receiving 

station. This technique is called clock synchronous 

communication. 

To perform clock synchronous communication, the following 

conditions must be satisfied: 

(1) The value of parameter No. 5073 is equal or greater than 

the value of parameter No. 5070. The CNC assumes the 

use of clock synchronous communication when this 

condition is satisfied. 

-62-


(2) The TT signal from the CNC is connected to the RT signal 

for the host, and the TT signal from the host is connected to 

the RT signal for the CNC, in both cases via cables. 

(3) A synchronizing clock, the same as the baud rate clock, is 

output from the TT pins. JIS refers to this signal as the 

transmission signal element timing. 

CNC Host 

In clock synchronous communication, the transmission clock is 

determined from the baud rate. The transmission clock output 

by the transmitting station is used as the reception clock. To 

perform clock synchronous communication, set the following 

from the host computer: 

(1) The host shall output the transmission signal element 

timing as the TT signal (ST1 signal, as defined by JIS). 

(2) The TT signal clock cycle shall be the same as the baud rate 

clock cycle (clock rate: 1). 

5071 RS-422 I/O specifications number (Remoto buffer) 




Set the specification number of the host (reader/punch device) of the 

remote buffer. 

The specification numbers and their corresponding reader/punch 

device specifications are as follows. 

Specification 

No. 

1 

2 

3 

4 

8 

TT 

*TT 

RT 

*RT 

-63- 

Reader/punch device specification 

Uses the control codes (DC1-DC4). Outputs feed by 

punching. Tape reader. 

Does not use the control codes (DC1-DC4). Outputs feed 

by punching. 

Uses the control codes (DC1-DC4). Does not outputs feed 

by punching. 

Does not use the control codes (DC1-DC4). Does not 

outputs feed by punching. 

PROGRAM FILE Mate 

Handy File (remote mode) 

RT 

*RT 

TT 

*TT


5072 RS-422 Number of stop bits (Remote buffer) 




Set the number of stop bits of the RS-422 device of the remote buffer. 

NOTE 

When this stop bit is set to 1, the parity bit is also 

provided. 

5073 RS-422 baud rate (Remote buffer) 




Set the baud rate of the RS-422 device of the remote buffer. 

The settings and their corresponding baud rates are as follows. 

Setting value baud rate Setting value baud rate 

- - 9 2400 

2 100 10 4800 

3 110 11 9600 

4 150 12 19200 

5 200 13 38400 

6 300 14 76800 

7 600 15 86400 

8 1200 

5074 RS-422 Selection of protocol (Remote buffer) 




NOTE 



take effect. 

-64- 

1 : Protovol B 

2 : Expansion protocol B 

3 : Protocol A/expansion protocol A by the 

parameter .


NOTE 

In the case when the protocol A/expansion protocol A 

were selected, if the following parameters are modified, 

they become valid after the power is turned off and then 

on. 

No. 5070, 5072, 5073 

5081 RS-232-C Specification of I/O device (Remote buffer) 




Set the specification number of the RS-232-C I/O device of the 

remote buffer. 

The specification numbers and their corresponding reader/punch 

device specifications are as follows. 

Specification 

Reader/punch device specification 

No. 

Uses the control codes (DC1-DC4). Outputs feed by 

1 

punching. Tape reader. 

Does not use the control codes (DC1-DC4). Outputs feed 

2 

by punching. 

Uses the control codes (DC1-DC4). Does not outputs feed 

3 

by punching. 

Does not use the control codes (DC1-DC4). Does not 

4 

outputs feed by punching. 

7 FANUC CASSETTE (Bubble cassette) 

FLOPPY CASSETTE, PROGRAM FILE Mate 

8 

Handy File (remote mode) 

5082 RS-232-C Number of stop bits (Remote buffer) 




Set the number of stop bits of the RS-232-C device of the remote 

buffer. 

NOTE 

When this stop bit is set to 1, the parity bit is also 

provided. 

5083 RS-232-C BAUD rate (Remote buffer) 




-65-


Set the baud rate of the RS-232-C device of the remote buffer. 

Setting value baud rate Setting value baud rate 

1 50 7 600 

2 100 8 1200 

3 110 9 2400 

4 150 10 4800 

5 200 11 9600 

6 300 12 19200 

5084 RS-232-C Selection of protocol (Remote buffer) 




NOTE 



take effect. 

-66- 

1 : Protocol B 

2 : Expansion protocol B 

3 : Protocol A/expansion protocol A by the 

parameter . 

NOTE 

In the case when the protocol A/expansion protocol A 

were selected, if the following parameters are modified, 

they become valid after the power is turned off and then 

on. 

No. 5070, 5072, 5073


10.3 PARAMETERS RELATED TO BINARY INPUT OPERATION 

2010 Delay time of strobe signals MF, SF, TF, and BF 

[Input section] Parameter input 

[Data type] Integer type 

[Unit of data] msec 


Set the time from the point an M, S, T, or B code is sent until the 

strobe signal MF, SF, TF, or BF signal is sent. 

2012 Output time of strobe signals MF, SF, TF, and BF 



[Unit of data] msec 


Set the time from the point the strobe signal MF, SF, TF, or BF is sent 

until it is turned off. 

2034 Type of auxiliary function used in binary input operation mode (remote buffer) 




M, S, T, or B code 

MF, SF, TF, or BF signal 

M, S, T, or B code 

MF, SF, TF, or BF signal 

Set the type of auxiliary function used in binary input operation mode. 

0: Second auxiliary function 

1: Miscellaneous function 

2: S function 

3. T function 

-67- 

Delay time 

Delay time Sending time


#7 #6 #5 #4 #3 #2 #1 #0 

7609 RAX RDS 



#2 RDS The data format for the travel distance along an axis in 

remote buffer binary input operation mode is: 

0: Special format 

1: General format 

#3 RAX In remote buffer binary input operation mode, auxiliary 

functions are: 

0: Not used. 

1: Used. 

#7 #6 #5 #4 #3 #2 #1 #0 

2007 G5S 



#3 G5S In binary input operation mode, the single-block stop is: 

0: Disabled. 

1: Enabled. 

#7 #6 #5 #4 #3 #2 #1 #0 

7618 TM2 TM1 TM0 



NOTE 



take effect. 

#0 TM0 

#1 TM1 Travel distance per unit time along each axis 

#2 TM2 In the format for remote buffer binary input operation 

data, the travel distances per unit time along the 

individual axes are arranged sequentially. Set the unit 

time in msec. 

-68-


TM2 TM1 TM0 Unit time 

1 0 0 1 msec 

0 0 1 2 msec 

0 1 0 4 msec 

0 0 0 8 msec 

0 1 1 16 msec 

7635 Number of axes in a single block that can accept commands (remote buffer) 



[Valid data range] 0 to number of controlled axes 

Set the number of axes in a single block that can accept commands 

when using binary input operation mode. Do not change this 

parameter during operation. 

NOTE 

The axes that can accept commands from the remote 

buffer are the first n axes in the controlled axis list, where 

n is the number of axes specified for this parameter. 

For example, when this parameter is 3, the fourth and 

any subsequent axes in the controlled axis list cannot 

accept commands. 

#7 #6 #5 #4 #3 #2 #1 #0 

7713 G5H 



#3 G5H In binary input operation mode, acceleration/deceleration 

before look-ahead interpolation or fine HPCC is: 

0: Enabled. 

1: Disabled. 

Only when the unit time is 1 msec (2 msec for a system 

with 11 or more controlled axes), 

acceleration/deceleration before look-ahead interpolation 

or fine HPCC can be disabled in binary input operation 

mode by using this parameter. 

Note that to do this, acceleration/deceleration before 

look-ahead interpolation or fine HPCC must be enabled. 

In operation with the unit time shorter than 8 msec, 

acceleration/deceleration before look-ahead interpolation 

or fine HPCC must be enabled. 

-69-

11. ALARM B-63322EN-1/01 

11 ALARM 

Error code Message Description 

PS0010 IMPROPER G-CODE An unavailable G code is specified. 

PS0011 IMPROPER NC-ADDRESS An address that cannot be specified in an NC statement is specified. Or, 

parameter No. 1020 is not specified. 

PS0012 INVALID BREAK POINT OF 

WORDS 

SR0807 PARAMETER SETTING 

ERROR 

SR0855 DATA SET READY DOWN 

(RMT-BUF) 

SR0856 BUFFER OVERFLOW 

(RMT-BUF) 

Data that is not in the word format of address + numeric value is found in 

an NC statement. 

This alarm is also issued if data that is not a reserved word is specified or the 

syntax is not followed correctly in a custom macro. 

An input/output interface not attached with an option is specified. 

The parameter setting for the baud rate for communication with an 

external input/output device, the number of stop bits, or the protocol 

selection contains an error. 

The data set ready signal for reader/punch interface 10 turns off. Or, the CD 

signal (for the RS-232-C interface only) turns off. 

When the NC received data via reader/punch interface 10, the stop code 

(DC3) was sent, but data exceeding a constant amount (512 characters 

for the protocol B and 2560 characters for the extended protocol B) was 

received. 

SR0890 CHECK SUM ERROR (G05) A check sum error occurred. (Remote buffer binary input operation) 

SR0891 ILLEGAL COMMAND G05 G05 was issued when it could not be issued. 

SR 941 COMMUNICATION ERROR 

(RMT-BUF) 

The remote buffer side detected an illegal command (CNC abnormality). 


(RMT-BUF) 

Time-out resulted in protocol A (abnormality in host). 

SR 945 COMMUNICATION ERROR The number of retry times has been exceeded in protocol A (abnormality 

(RMT-BUF) 

in host). 


(RMT-BUF) 

Framing error and overrun error resulted. 

SR 947 COMMUNICATION ERROR Invalid response command has been received in protocol A (abnormality 

(RMT-BUF) 

in host). 

SR 948 COMMUNICATION ERROR Protocol A detected an error code (abnormality in HOST). 

(RMT-BUF) 

Three possible causes are: 

1. An END code is detected in a command name. 

2. The command is undefined. 

3. A command other than the expected one is received. 

-70-

B-63322EN-1/01 12. MAINTENANCE 

12 MAINTENANCE 

12.1 LED INDICATIONS 

12.1.1 Normal State 

The arrangement of the LEDs on 

the R.B. board is as shown in the 

figure on the right. 

The upper two LEDs (green) 

indicate the current state of the 

software. 

The lower three LEDs (red) 

indicate the state of the hardware. 

The meanings of the LEDs are 

explained below. 

When the LEDs are either on or off (not flashing) and no error 

messages are displayed on the screen, the LEDs indicate the current 

state of the remote buffer board, and the remote buffer board is in the 

normal state. 

No. LED indication 

Table 12.1.1 LED (green) indications and their meanings (STATUS LED) 

Meaning Code Remarks 

1 

1 

2 

The power has just been turned on, and the remote buffer CPU has not 

been activated. 

3 

2 

1 

2 

The board is in the power-on process, waiting for all the modules to be 

initialized. 

3 1 The board is idle, waiting for requests (commands) from the CNCs. 1 

2 

4 

1 

The board has received a request (command) from a CNC, and is 

handling it. 

2 

5 1 The board has received a stop request due to a reset/alarm/program 

2 

end, and is waiting for the CNC to shut down. 

: On : Off 

-71- 

1 

2 

A 

B 

C 

STATUS LED 

ALARM LED 

0 

2 

3 

: Green 

: Red

12. MAINTENANCE B-63322EN-1/01 

12.1.2 System Errors 

When the LEDs are in any of the statuses shown below, there is a 

system error. For recovery, the board must be turned off then on 

again. The hardware may have to be replaced in some causes. 

Table 12.1.2 (a) LED (green) indications and their meanings (STATUS LED) 

No. LED indication Meaning Code Message 

1 1 An error occurred during a DRAM module test. ("RMT-BUF DRAM 

Displayed. 

2 

TEST:ERROR" is displayed on the screen, and the system fails to 

start.) 

2 1 

2 

The results of the parity check could not be accepted upon loading into 

the code area. (A system alarm error message is displayed, and the 

system fails to start.) (See Table 12.1.2 (c), "System alarm error 

messages.") 

1 Displayed. 

3 1 NMI occurred in a module other than the remote buffer. 2 Not 

2 

displayed. 

4 

1⇔ 1 

2⇔ 2 

LEDs 1 and 2 

flash 

alternately. 

Together with this LED indication, a system alarm error message is 

displayed. (See Table 12.1.2 (c), "System alarm error messages.") 

a) Hardware failure 

b) Illegal interrupt (generation of an invalid interrupt) 

c) F-BUS error 

d) DRAM parity error 

e) ARES bus error 

f) LFP bus error 

g) F-BUS write bus error 

h) Non-F-BUS write bus error 

: On : Flashing : Off 

-72- 

4 

5 

6 

7 

8 

9 

A 

B 

Displayed. 

When the LEDs are in any of the statuses shown above, perform an 

address search for 4n80E014 on the memory display screen, make a 

note of the contents of the nine words prior to 4n80E024, and report 

them. 

In the above explanation, n is the logical slot number of the remote 

buffer (609I series). 

(See "Determining the Logical Slot Number of the Remote Buffer 

Board," described below.) 

NOTE 

The DRAM area of the remote buffer is 4n8000000H to 

4n9FFFFFH. If an attempt is made to display an address 

outside this range, a system error occurs.


Table 12.1.2 (b) LED (red) indications and their meanings (ALARM LED) 

No. LED (red) indication Meaning 

A 1 

This board is reset. 

2 

It is not activated by the main CPU. 

3 

B 1 

L-BUS bus error 

2 

3 

An error occurred inside this printed circuit board. 

The printed circuit board must be replaced. 

C 1 

DRAM parity error 

2 

3 

An error occurred in the DRAM module mounted in this printed circuit board. 

Replace the DRAM module. 

: On : Off 

Table 12.1.2 (c) System error messages 

Code Message Description 

1 DRAM CHECK SUM ERROR The results of the parity check could not be accepted upon 

loading into the code area. 

4 HARD ERROR The printed circuit board must be replaced. 

5 UNDEF IRT 00nn(aaaaaaaa) ERR-CODE:cccc An illegal interrupt was generated. 

00nn: Type of the generated interrupt 

cccc: Error code 

6 F-BUS ERROR(aaaaaaaa) When the R.B. board is the F-BUS bus master, a cycle 

results in a bus error. 

7 DRAM PARITY 000n(aaaaaaaa) A parity error occurred in DRAM. 

000n: Byte train in which the error occurred 

8 BUS ERROR(ARES) (aaaaaaaa) When the ARES is the L-BUS bus master, a cycle results 

in a bus error. 

9 BUS ERROR(LFP) (aaaaaaaa) When the LFP is the L-BUS bus master, a cycle results in 

a bus error. 

A WRITE BUS ERROR(F-BUS) (aaaaaaaa) When F-BUS is the L-BUS bus master, a write cycle 

results in a bus error. 

B WRITE BUS ERROR(aaaaaaaa) When a device other than the F-BUS is the L-BUS bus 

master, a write cycle results in a bus error. 

* aaaaaaaa is the execution address (next instruction) at the time 

the error occurs. 

-73-


12.2 MATERIAL FOR REMOTE BUFFER TROUBLESHOOTING 

NOTE 

For an explanation of the logical slot number of the R.B. 

(remote buffer) board, see "Determining the Logical Slot 

Number of the Remote Buffer Board," below. 

No. External phenomenon Investigation method 

1 Operation does not start even after a cycle start. Follow the procedure described below: 

1 Check if the LED indication is No. 4, described under 

It is assumed that the following parameters "Normal state" in Section 1.1. If it is not, see the 

are set correctly: 

"Explanation of LED Indications." 

• Baud rate 

2 Perform address searches for the following addresses on 

RS422: parameter 5073 

the memory display screen to check the contents of the 

RS232C: parameter 5083 

buffer (with "long" specified for the read/write pointers and 

• Number of stop bits 

"byte" specified for the buffer). 


n: logical slot number of the R.B. board (Note 1) 


4n810500(long) : read pointer 

• Protocol type 

4n810504(long) : write pointer 


4n810508(Byte) 


: : buffer (8Kbyte) 

• External synchronization baud rate 

4n812507(Byte) 


• If the read pointer is equal to the write pointer, the 

• I/O device specification number 

buffer is empty and the cause of the error is in the 


remote buffer or in the host. 


• If the read pointer is not equal to the write pointer, the 

cause of the error is in the NC. 

3 Perform address searches for the following addresses on 

the memory display screen to check the latest send data 

(256 bytes) in the remote buffer (with "long" specified for 

the write pointer and "byte" specified for the send buffer). 

4n823100(long) : write pointer 

4n823104(Byte) 

: 

4n823203(Byte) 

: send buffer (256byte) 

2 Operation stopped prior to its completion. 

The address equal to 4n823104 + (write pointer - 1) 

contains the latest send data. 

Note) The DRAM area of the remote buffer is 4n8000000H to 

4n9FFFFFH. If an attempt is made to display an 

address outside this range, a system error occurs. 

Follow the same procedure as that described above. 

The causes are the same as those described above. 

-74-


No. External phenomenon Investigation method 

3 (1) SR807 

PARAMETER SETTING ERROR 

(2) SR855 

DATA SET READY DOWN(RMT-BUF) 

(3) SR856 

BUFFER OVWERFLOW(RTM-BUF) 

(4) SR941 

COMMUNICATION ERROR(RMT-BUF) 

(5) SR946 

COMMUNICATION ERROR(RMTR-BUF) 

(1) A required parameter is out of range. 

1 Baud rate: parameter 5073 = 1 to 15, 5083=1 to 12 

2 Number of stop bits: parameter 5072 or 5082 = 1 or 2 

3 Protocol type: parameter 5074 or 5084 = 1 to 3 

The DR signal is OFF or the CD signal (which can be 

detected when the setting is RS232C and bit 4 of parameter 

No. 5000 is 0). 

1 A connector or signal line is not connected. 

Check the signal line connections, referring to the 

connection diagrams shown in Sections 3.2 and 3.3. 

2 The I/O device is not turned on. 

3 An I/O device detected an error. 

The remote buffer is full. 

1 An interruption (DC3/RS signal OFF) request cannot be 

accepted. 

(Error on the host) 

Software error on the NC 

1 An illegal command code request was made from the NC. 

Framing error, overrun error 

1 The baud rate is not appropriate. 

2 The number of stop bits is not set correctly. 

3 Reception overrun 

-75-


12.3 DETERMINING THE LOGICAL SLOT NUMBER OF THE 

REMOTE BUFFER BOARD 

12.3.1 Determining the Logical Slot Number on the Screen 

Displayed at the Time a System Alarm Occurs 

Display hardware information 1 (display of F-BUS slot information), 

shown below, using the 

FANUC Series 15I F001A 

SYS_ALM 300 SYSTEM ALARM (F-BUS SLOT (1)) 

OTHER-CPU 

ERROR OCCURRED AT 1999/03/12 12:34:56 

HARDWARE INFORMATION 1 

F-BUS SLOT CONFIGURATION 

-76- 

 

6/27 MODULE NAME M ID SLOT IO DATA 

+---------+-----------------------------+----------+---------------------------------------+ 

00:00 MOTHER BOARD 1234 0000 0000 0000 0000 0000 

02:09 REMOTE BUFFER 10E1 0000 0000 0000 0000 0000 

PAGE UP OR DOWN (PAGE 6/ 8) 

page keys. 

On the screen, the second half of the number identified by the SLOT 

column and the row containing REMOTE BUFFER (shown in the 

MODULE NAME column) is the logical slot number. In the 

example, the logical slot number of the remote buffer is 09.


12.3.2 Determining the Logical Slot Number on the System 

Configuration Screen 

Once the system has started normally, the logical slot number of the 

remote buffer printed circuit board can be determined by displaying 

the module configuration screen from the system configuration screen 

by means of the procedure described below. 

(1) Press key 

. 

(2) Press soft key [SYSTEMCONFIG]. 

(3) Select the remote buffer module configuration screen, shown 

below, using the 

-77- 

 

page keys. 

• Slot number: Number of the logical slot in which the remote 

buffer printed circuit board is installed. 

The number enclosed in parentheses ( ) is the 

physical slot number.

B-63322EN-1/01 

A 

Alarm 70 

Alarm and reset of CNC 49 

B 

Binary input operation function 53 

Buffer control 48 

C 

Code system 14 

Command 17 

Command table 17 

Communication example 32 

Communication system 15, 27, 42 

Control code 48 

D 

Data interface 51 

Data packet format 28 

Data part 52 

Description of data part 

Determining the logical slot number of the remote 

19 

buffer board 

Determining the logical slot number on the screen 

76 

displayed at the time a system alarm occurs 

Determining the logical slot number on the system 

76 

configuration screen 77 

E 

Electrical interface 3, 5 

Error process 24 

Exclusive parameter for remote buffer 61 

Expansion protocol A 26 

Expansion protocol B (RS-422) 50 

F 

Function explanation 54 

I 

i-1 

INDEX 

Input device number 60 

Interface between remote buffer and host computer 2 

Interface of data part 52 

L 

LED indications 71 

M 

Maintenance 71 

Material for remote buffer troubleshooting 74 

Message format 14 

Monitor packet format 30 

N 

Normal state 71 

P 

Parameter 59 

Parameter table 23 

Parameters related to binary input operation 67 

Protocol A 13 

Protocol B 41 

R 

RS-232-C interface 7 

RS-422 interface 10 

S 

Software interface 4 

Status transition 25 

System errors 72 

T 

Transfer rate 57 

Transmission system 6 

W 

When the CNC alarm/reset is not posted to the host 42 

When the CNC alarm/reset is posted to the host 44

01 Jul., ’99 

Revision Record 

FANUC Series 15i/150i-MODEL A Remote Buffer DESCRIPTIONS (B-63322EN-1) 

Edition Date Contents Edition Date Contents

GE Fanuc Automation - Free

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